I'm speaking about the vast majority of people, who yes, build the same things. Look at any HN post over the last 6 months and you'll see everyone sharing clones of the same product.

Yes some ideas or novel, I would argue that LLMs destroy or atrophy the creative muscle in people, much like how GPS powered apps destroyed people's mental navigation "muscles".

I would also argue that very few unique valuable "things" built by people ever had people saying "Why would you build that". Unless we're talking about paradigm shifting products that are hard for people to imagine, like a vacuum cleaner in the 1800s. But guess what, llms aren't going to help you build those things.. They can create shitty images, clones of SaaS products that have been built 50x over, and all around encourage people to be mediocre and destroy their creativity as their brains atrophy from their use.